Jafarizad, S., and A. Ranjbari. “Some Applications of the Open Mapping Theorem in Locally Convex Cones”. Ukrains’kyi Matematychnyi Zhurnal 73, no. 3 (March 19, 2021): 425 - 430. Accessed April 18, 2024. https://umj.imath.kiev.ua/index.php/umj/article/view/222.